from sqlalchemy import Column, Integer, String, Float, ForeignKey, DateTime, Boolean
from sqlalchemy.orm import relationship
from datetime import datetime
from .database import Base


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String, unique=True, index=True, nullable=False)
    password = Column(String, nullable=False)
    is_admin = Column(Boolean, default=False, nullable=False, server_default='0')

    purchases = relationship("Purchase", back_populates="owner", cascade="all, delete")


class Purchase(Base):
    __tablename__ = "purchases"

    id = Column(Integer, primary_key=True, index=True)
    amount_eur = Column(Float, nullable=False)
    price_eur = Column(Float, nullable=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)

    owner = relationship("User", back_populates="purchases")


class OHLCCandle(Base):
    __tablename__ = "ohlc_candles"

    id    = Column(Integer, primary_key=True, index=True)
    date  = Column(String, unique=True, index=True, nullable=False)  # "YYYY-MM-DD" UTC
    open  = Column(Float, nullable=False)
    high  = Column(Float, nullable=False)
    low   = Column(Float, nullable=False)
    close = Column(Float, nullable=False)